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18673 (1998 FH66)
Classification: Outer Main-belt Asteroid          SPK-ID: 2018673
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09316836717642718 3.4668e-08  
a 3.251209924741561 2.0805e-08 au
q 2.948300004705595 1.1145e-07 au
i .2171484994507873 3.9545e-06 deg
node 250.1288726162569 0.0011713 deg
peri 39.56647499127089 0.0011716 deg
M 197.8731271749065 2.3823e-05 deg
tp 2459964.813951375964
(2023-Jan-20.31395138)
0.00014094 TDB
period 2141.242944159322
5.86
2.0554e-05
5.627e-08
d
yr
n .1681266485813642 1.6138e-09 deg/d
Q 3.554119844777527 2.2744e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1620  
   data-arc span      10613 days (29.06 yr)  
   first obs. used      1991-01-12  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54294  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:31:33  

Additional Information
 Earth MOID = 1.932 au 
 Jupiter MOID = 1.58888 au 
 T_jup = 3.174 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7   n/a MPO452435  
diameter diameter 9.908 km 0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.072   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18673 (1998 FH66)          Discovered 1998-Mar-20 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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